If you have followed all the steps correctly, your computer should now boot right into the newly installed operating system, OS X Yosemite. Step 7: Choose the Macintosh HD partition you erased in step 5 and then click Install. Now click on Install OS X and then hit Continue. Step 6: When the erasing process is complete, return to the first screen where you selected Disk Utility. This will wipe all files stored on your startup hard drive. Leave all the settings at their default values and then hit Erase button at the bottom right. Step 5: Click on Macintosh HD from the left hand-side pane and then hit Erase tab on the top-right portion of the window. Many USB (often called flash drives) are plug-and-play for Mac these days. Step 4: Click on Disk Utility and then hit Continue. Formatting USB drives on a Mac is actually a simple process. This could take a few seconds or minutes. Step 3: Wait until the Yosemite installer appears on screen. Step 2: Choose the USB drive on the start-up drive selection screen and hit Enter/Return on the keyboard. As soon as the start-up chime plays, press the Option key (Alt). Step 1: Ensure the bootable USB flash drive is plugged into your Mac and restart the computer. How to Clean Install OS X Yosemite on Your Mac The OS X Yosemite bootable USB flash drive will be ready for use and you can start the clean installation process. Once the process completes, you will see the message " Copy Complete. Do not interrupt the Terminal or eject the flash drive during the process. Quickly and easily remove pesky junk and ghost files from your external USB drives. It is the most powerful USB cleaning utility ever made. This will create the bootable USB flash drive. Free Download USBclean 3 full version offline installer for macOS.Please replace a single "-" with "-" when you enter the above command line in the terminal. Note: The code above has missing double dashes in the quotes. Sudo /Applications/Install OS X Yosemite.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled -applicationpath /Applications/Install OS X Yosemite.app -nointeraction You can do this by using the Time Machine feature in Mac OS X, or third-party software such as Carbon Copy Cloner.Ĭ) Create a bootable USB flash drive with a storage size of at least 8GB.ĭ) Download OS X 10.10 Yosemite Final from the Mac App Store and save it to the Applications folder – its default location. MacBook (Late 2008 Aluminium, or Early 2009 or newer)ī) Back up important data and settings (photos, videos, music files, documents and the like) on your Mac to an external hard drive.Supported OS X Yosemite devices and first stepsĪ) Ensure your Mac is compatible with OS X Yosemite. Work with large capacity external USB-drives.Apple macOS Sierra: How to reinstall the Mac operating systemīefore we begin the detailed process of clean installing OS X Yosemite on Macs, there are a few things you'll need to do first.It’s one of the most practical utility apps to use every day with Snow Leopard / Lion / Mountain Lion. Use USBMate and see how much free space is really left in your USB Flash drive. When you erase files from a USB Flash drive, they’re only moved to the trash. Launch USBMate each time before ejecting a USB Flash drive, and it will stay clean and secure! That’s because only USBMate has a full-featured anti-virus program! Remember: Snow Leopard / Lion / Mountain Lion / Windows put temporary files and other junk in your USB Flash drive every time you use it. every time USBMate is launched, the anti-virus automatically checks and purges the USB Flash drive’s contents of all AutoRun viruses!Īll you have to do is launch the app before ejecting the USB Flash drive: A few seconds later, it will be optimized, clean and secure!.it will be made secure thanks to the built in anti-virus!. Spotlight-V100, Thumbs.db, etc.) will be erased. All temporary files left by Snow Leopard / Lion/ Mountain Lion or Windows (.DS_Store. its contents will be clean and optimized, without useless junk.Use USBMate every time before ejecting your USB Flash drive and: USBMate is an app which optimizes and accelerates the operation of USB Flash drives, external hard disks and Flash memory cards.
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